Classification of Jasinski and Sullivan 2011
G. †Prenocephale Maryańska and Osmólska 1974
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†Prenocephale goodwini Williamson and Carr 2003
Invalid names: Sphaerotholus Williamson and Carr 2003 [synonym]
Unr. Dinosauria Owen 1842 [dinosaur]
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Unr. †Ornithischia Seeley 1888 [ornithischian]
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Fm. †Pachycephalosauridae Sternberg 1945
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G. †Stegoceras Lambe 1902
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†Stegoceras novomexicanum Jasinski and Sullivan 2011
†Stegoceras validum Lambe 1902
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Invalid names: Ornatotholus browni Wall and Galton 1979 [synonym]
Invalid names: Ornatotholus Galton and Sues 1983 [synonym]
Invalid names: Gravitholus Wall and Galton 1979 [nomen dubium], Texacephale Longrich et al. 2010 [nomen dubium]
G. †Bistahieversor Carr and Williamson 2010
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†Bistahieversor sealeyi Carr and Williamson 2010